The thing which makes the vacuum flask system useful is the vacuum between the two
bottles. Producers of the vacuum flask try to create a perfect vacuum between the two bottles,
but it is impossible. Little air goes inside, too. This situation creates my experiment and
research question. There are many heat isolators so can there be any material that can be more
successful in conserving the temperature of the liquid added than the vacuum flask system?
To find an answer to my question, I chose 3 heat isolators (perlite, fire brick and silicone) and
put them into the flasks instead of the vacuum. In order to investigate their performance and
compare with the vacuum flask system, I planned four experiments. I added to the flasks
different liquids, water at the different temperature and water at different amounts and
measured the temperatures of the added liquids in different times. According to the results
from these 4 experiments, I reach to a conclusion that these isolators couldn’t perform a better
performance than vacuum in conserving the temperature of the liquid